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Construction & DIYGenerated accuracy model review: 2026-05-06
Flooring & Tile accuracy and testing
This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.
Formula source
- **Total Area = (Length × Width) × (1 + Waste%).** **Boxes Needed = Total Area / Box Coverage.** The result is always rounded up to the next full box.
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Room Length: 15 ft
- Room Width: 12 ft
- Waste %: 10%
- Coverage per Box: 20 ft²
Expected outputs
- Boxes Needed: 10
- Area + Waste: 199 ft²
- Net Room Area: 180 ft²
Known limitations
- This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
- Use the result as a planning estimate unless the calculator page states a stricter purpose.
Assumptions
- The room is treated as a simple rectangle measured in feet.
- Coverage per box must be a positive number from the product packaging.
- Waste percentage should be zero or greater and reflects cuts, breakage, and spare material.
Unit handling
- Room Length accepts values in ft.
- Room Width accepts values in ft.
- Waste % accepts values in %.
- Coverage per Box accepts values in ft².
- Area + Waste is displayed in ft².
- Net Room Area is displayed in ft².
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current flooring-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for Flooring & Tile.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.